Now, we’re not sure if the Twitter complaints are entirely reliable, since we don’t know which version any of these folks are updating from. The tech site Ars Technica ran some tests and found that though the update from iOS 6 to iOS 7 carried a “statistically significant drop in battery life,” the update from iOS 7.0 to iOS 7.1 did not materially affect iPhone or iPad battery usage.

That said, these complaints are multiplying, and Yahoo Tech’s Rafe Needleman, who updated from iOS 7.06, says his iPhone has been intermittently rebooting since he downloaded the system (a problem that iOS 7.1 was supposed to fix).

Some have suggested reinstalling the software via iTunes to work out the kinks, though it’s not clear if that will actually help the problem. Apple has yet to acknowledge any issues.

Apple released iOS 7.1, its first major update to the redesigned iOS 7 mobile operating system, on Monday.

Annoying, right? But look on the bright side: At least there’s no security breach in this update.